WHY DO SO MANY PEOPLE DO SUCH DUMB THINGS

WORKING IN TRANSPORTATION I REALIZED THAT THERE ARE MANY DUMB PEOPLE TRAVELING EVERYDAY AND DONT KNOW THE DIFFERENCE FROM GATE 5 AND GATE 1... , OR A RED BUS OR A BLUE BUS., OR THAT SOME PEOPLE FEEL ITS OK TO DRIVE 20 MPH IN THE FAST LANE OF A HIGHWAY.  I FOUND OUT THAT COMMON SENSE DOES NOT EXIST AMONG MOST PEOPLE ANY MORE...   WHAT DO YOU THINK..